package com.tensquare.user.interceptor;

import io.jsonwebtoken.Claims;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;
import org.springframework.web.servlet.HandlerInterceptor;
import util.JwtUtil;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

@Component
public class JwtInterceptor implements HandlerInterceptor {

    @Autowired
    private JwtUtil jwtUtil;
    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
        System.out.println("经过了拦截器");
        //无论如何都放行。具体能不能操作还是在具体的操作中去判断。
        //拦截器只是负责把请求头中包含token的令牌进行一个解析
        String header = request.getHeader("Authorization");

        if(header!=null && !"".equals(header)){

            //如果有包含含有Authorization头信息，就对其进行解析
            if(header.startsWith("Bearer ")){
                //得到令牌
                String token = header.substring(7);
                //对令牌进行验证
                try{
                    Claims claims = jwtUtil.parseJWT(token);
                    String roles = (String) claims.get("roles");
                    System.out.println(roles);
                    if(roles != null && roles.equals("admin")){

                       request.setAttribute("claims_admin",token);

                    }
                    if(roles != null && roles.equals("user")){

                        request.setAttribute("claims_user",token);

                    }

                }catch (Exception e){
                    throw new RuntimeException("令牌有误！");
                }
            }

        }
        return true;
    }
}
